Portable sewing machine



FIG. 1 is a top front perspective view of a portable sewing machine showing my new design, and showing the arm in an open condition;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof showing the arm in a closed condition;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left side view thereof; and

FIG. 8 is a right side view thereof. 

The ornamental design for a portable sewing machine, substantially as shown and described. 